head title meta link script style header footer nav main article section div span h1 h2 h3 h4 h5 h6 p a img ul ol li form input button textarea label select option table tr td th thead tbody tfoot caption strong em i b u br hr blockquote q code pre kbd samp mark del ins small sub sup figure figcaption iframe audio video source track canvas svg path circle rect line polygon polyline defs use g text tspan